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200,96 = 3,14 x r²
200,96 = 3,14r²
r² = 200,96
3,14
r² = 64
r = √ 64
r = 8 cm
Keliling lingkaran = 2 x π x r
= 2 x 3,14 x 8
= 6,28 x 8
= 50,28 cm²
r² = 200,96/3,14
r² = 64
r = √64 = 8 cm
d = 8 × 2 = 16 cm
Keliling = 3,14 × 16
= 50,24 cm